Monitoring and reporting web gui for Bacula
Firewall log analyzer
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Open Source Monitoring System for performance and availability.
Nagios Open Source network monitoring software - The Standard In ITM
Enhanced Apache Server Status page - for one or multiple servers
Painel de Monitoramento em PHP/MySQL
free netflow analyzer
Enterprise-class, distributed monitoring solution for networks & apps
Xplico is a Network Forensic Analysis Tool (NFAT)
PHP-based looking glass for Cisco, Juniper & Zebra/Quagga routers
OPTOSS Next Gen Network Management System (NG-NetMS)
REST interface and configuration GUI for Nagios
Webinterface to (un)ban IPs in Fail2Ban
PotHead
Open source tool to monitor your servers and websites
Open Source SIEM
Netflow visualisation and investigation tool
DOCSIS network management